Develop Reference

ExtJS 5: Accessing bound store in component

I'm having a real hard time understanding how to access the actual bound store instance on a component, like a ComboBox or Grid. It appears that when you use their getStore method, it returns a different instance.
In my example, I have a custom grid class, and in its initComponent, I want to add a load listener. Unfortunately, the load listener never gets hit, but the bound store's load listener does. You can see the listener is getting set up before the store is loaded, so that's not the issue. It looks like the store instance in initComponent is a memory store, so the bound store's instance is not synced to the component at this point.
I know I can have a load listener on the bound store, but this is a custom grid class, and for any custom grid class, I want there to be a listener set up... so I don't want to have to do this all over the place in my code... I just want it in one class, as they're all going to have the same logic carried out.
Can someone explain to me why my custom grid class's load listener is not getting hit, and what can I do to fix this? Can I somehow access the bound store instance?
Ext.application({
name: 'Fiddle',
launch: function() {
Ext.define('MyGrid', {
extend: 'Ext.grid.Panel',
xtype: 'myGrid',
initComponent: function() {
alert('initComponent')
this.callParent();
this.getStore().on('load', this.onLoad, this);
},
onLoad: function() {
alert('grid store loaded');
}
});
Ext.define('MyViewController', {
extend: 'Ext.app.ViewController',
alias: 'controller.myview',
onLoadBoundStore: function() {
alert('loaded bound');
}
})
Ext.define('MyViewModel', {
extend: 'Ext.app.ViewModel',
alias: 'viewmodel.myview',
stores: {
myStore: {
fields: ['name', 'value'],
autoLoad: true,
proxy: {
type: 'ajax',
url: 'data1.json',
reader: {
type: 'json'
}
},
listeners: {
load: 'onLoadBoundStore'
}
}
}
});
Ext.define('MyView', {
extend: 'Ext.form.Panel',
renderTo: Ext.getBody(),
controller: 'myview',
viewModel: {
type: 'myview'
},
items: [{
title: 'blah',
xtype: 'myGrid',
reference: 'myComboBox',
bind: {
store: '{myStore}'
},
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Value',
dataIndex: 'value'
}]
}]
});
Ext.create('MyView')
}
});

Can someone explain to me why my custom grid class's load listener is
not getting hit, and what can I do to fix this?
You are not initially providing any store to your grid (the store config option is required by the way). Hence the grid is creating its own, empty store as coded here:
store = me.store = Ext.data.StoreManager.lookup(me.store || 'ext-empty-store');
That empty store is the one that gets your onLoad listener attached. It is not getting hit because the store is never loaded.
Can I somehow access
the bound store instance?
Yes, use this:
this.lookupViewModel().getStore('myStore')
You can attach your listener to the bound store instead of the empty one and see the difference. The grid's empty store eventually gets replaced by the bound one (this is why you see data in the grid, after all), but this happens after initComponent is executed. You can track the moment of setting the bound store to the grid by overriding setStore method.
I know I can have a load listener on the bound store, but this is a
custom grid class, and for any custom grid class, I want there to be a
listener set up... so I don't want to have to do this all over the
place in my code... I just want it in one class, as they're all going
to have the same logic carried out.
Since you are using MVVC it is recommended to stick to the pattern and keep views declaring view aspects only. Listeners should be declared and handled in controllers (not even in viewmodels like in your example). Otherwise, if you continue sticking to pre Ext JS 5 style and put dynamic stuff in views (i.e. the grid in your case) there is no point in using MVVC.

This is so incredibly hacky that I don't even want to post it as an answer, but I'm going to just for posterity sake. Building on Drake's answer, I figured out how to get my store using what was passed in the initial config of my grid class. The bind comes in with the braces, so that's why I'm doing a replace on it. Like I said, this probably should never be used, but it's something.
initComponent: function() {
var store = this.lookupViewModel().getStore(this.config.bind.store.replace(/[{}]/g, ''));
store.on('load', this.onLoad, this);
this.callParent();
},

Just to add one more option to the mix, you can listen to the reconfigure event on the grid, as that's what fires after binding a store is complete... so something like this would work:
Ext.application({
name: 'Fiddle',
launch: function() {
Ext.define('MyGrid', {
extend: 'Ext.grid.Panel',
xtype: 'myGrid',
initComponent: function() {
alert('initComponent')
this.on('reconfigure', this.onReconfigureGrid, this);
this.callParent();
},
onReconfigureGrid: function(grid, store, columns, oldStore, oldColumns, eOpts) {
store.on('load', this.onLoad, this);
},
onLoad: function() {
alert('grid store loaded');
}
});
Ext.define('MyViewController', {
extend: 'Ext.app.ViewController',
alias: 'controller.myview',
onLoadBoundStore: function() {
alert('loaded bound');
}
})
Ext.define('MyViewModel', {
extend: 'Ext.app.ViewModel',
alias: 'viewmodel.myview',
stores: {
myStore: {
fields: ['name', 'value'],
autoLoad: true,
proxy: {
type: 'ajax',
url: 'data1.json',
reader: {
type: 'json'
}
},
listeners: {
load: 'onLoadBoundStore'
}
}
}
});
Ext.define('MyView', {
extend: 'Ext.form.Panel',
renderTo: Ext.getBody(),
controller: 'myview',
viewModel: {
type: 'myview'
},
items: [{
title: 'blah',
xtype: 'myGrid',
reference: 'myComboBox',
bind: {
store: '{myStore}'
},
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Value',
dataIndex: 'value'
}]
}]
});
Ext.create('MyView');
}
});

Sencha Touch 2.3.1 - onTap() record parameter returns empty object

I have a simple Sencha App that has a main view. The view extends the Ext.navigation.View so that I can "push" to a new view when the user selects an item in the list. This happens by setting up a listener and then calling the push function on the MainView object.
However, I'm having problems getting the data across to that view. I tried using the answer from this StackOverflow question, but it didn't work.
In that answer it suggests that you use the record parameter of the itemTap() function, but this returns as an empty object.
Why does record return as an empty object?
Perhaps I'm going about this the wrong way?
In my case, I have a list of "brands", each with a title, image and description. I'd like to use that in the panel that slides in.
The launch function of my app which creates the view and ads to the viewport
launch: function() {
// Destroy the #appLoadingIndicator element
Ext.fly('appLoadingIndicator').destroy();
// Create instance of the main view so we can use it's functions
SenchaTest.MainView = Ext.create('SenchaTest.view.Main');
// Initialize the main view
Ext.Viewport.add(SenchaTest.MainView);
},
Here is my view
Ext.define('SenchaTest.view.Main', {
extend: 'Ext.navigation.View',
xtype: 'main',
requires: [
'Ext.TitleBar',
'Ext.Video',
'Ext.carousel.Carousel',
'Ext.Img'
],
config: {
fullscreen: true,
items: [
{
title: 'Test',
layout: {
type: 'vbox',
align: 'stretch'
},
items: [{
xtype: 'highlightscarousel',
flex: 0.35
}, {
xtype: 'list',
displayField: 'title',
flex: 0.65,
store: Ext.create('SenchaTest.store.Brands'),
itemTpl: '<img src="{image}" class="listThumb"><h1 class="listTitle">{name}</h1><span class="clearFloat"></span>',
listeners: {
itemtap: function(nestedList, list, index, element, post, record) {
}
}
}]
}
]
}
});

Based on the Sencha Touch docs, the signature of the itemtap listener is:
(this, index, target, record, e, eOpts)
you're using:
(nestedList, list, index, element, post, record)
so that might be why the record is an empty object. If that's not the case, could you post a JSFiddle or some kind of working example of the problem?

Sencha touch store - phantom data

I created a model like
Ext.define('MyApp.model.ContainerDetailsModel', {
extend: 'Ext.data.Model',
alias: 'model.ContainerDetailsModel',
config: {
fields: [
{
name: 'id',
allowNull: false,
type: 'string'
},
{
name: 'container_types_id',
type: 'string'
}
]
}
});
and a store like this
Ext.define('MyApp.store.ContainerDetailsStore', {
extend: 'Ext.data.Store',
requires: [
'MyApp.model.ContainerDetailsModel'
],
config: {
model: 'MyApp.model.ContainerDetailsModel',
storeId: 'ContainerDetailsStore',
proxy: {
type: 'ajax',
enablePagingParams: false,
url: 'hereIsServiceUrl',
reader: {
type: 'json'
}
}
}
});
Now somewhere in application I tried to get one record like:
var detailsStore = Ext.getStore("ContainerDetailsStore");
detailsStore.load();
var detailsRecord = detailsStore.last();
But it gaves me undefined. The json returned by service is ok, it use it in different place as source for list. I already tried to change allowNull to true, but there is no null id in source. I tried set types to 'int' with the same result.
So I have tried
console.log(detailsStore);
Result is like this (just important values):
Class {
...
loaded: true,
data: Class {
...
all: Array[1] {
length: 1,
0: Class {
container_types_id: "1",
id: "726",
....
}
...
}
...
},
...
}
In the same place
console.log(detailsStore.data);
returns (as it should):
Class {
...
all: Array[1] {
length: 1,
0: Class {
container_types_id: "1",
id: "726",
....
}
...
}
but (next line)
console.log(detailsStore.data.all);
returns
[]
And it's empty array. When i try any methods from the store it says the store is empty.
I wrote console.log() lines one after another - so for sure it doesn't change between them (I try it also in different order or combinations).
My browser is Google Chrome 23.0.1271.97 m
I use Sencha from https://extjs.cachefly.net/touch/sencha-touch-2.0.1.1/sencha-touch-all-debug.js
How can I take a record from that store?

store.load() Loads data into the Store via the configured proxy. This uses the Proxy to make an asynchronous call to whatever storage backend the Proxy uses, automatically adding the retrieved instances into the Store and calling an optional callback if required. The method, however, returns before the datais fetched. Hence the callback function, to execute logic which manipulates the new data in the store.
Try,
detailsStore.load({
callback: function(records, operation, success) {
var detailsRecord = detailsStore.last();
},
scope: this
});

extjs ServerProxy error on save

I'm trying to update a field value from a grid row icon. But I get this error:
Uncaught Ext.data.proxy.Server.buildUrl(): You are using a ServerProxy but have not supplied it with a url.
I'm using a RestProxy, this is the store definition:
Ext.define('SF.store.Contents', {
requires: [
'SF.Config',
'SF.store.RestProxy'
],
extend: 'Ext.data.Store',
model: 'SF.model.Content',
autoLoad: false,
proxy: Ext.create('SF.store.RestProxy', {
url: (new SF.Config()).getApiBaseUrl() + "admin/contents"
}),
});
column code on GridPanel definition
....
store: 'Contents',
.....
{ xtype: 'actioncolumn', header: 'Action'
, width: 40
, items: [{ // Delete button
icon: '......./cancel.png'
, handler: function(grid, rowIndex, colindex) {
var record = grid.getStore().getAt(rowIndex);
record.set('status',6);
record.save(); //THIS CALL THROWS THE ERROR
grid.store.remove(record);
}
},......
In addition, the proxy is working fine for GET request. Does anyone knows what should I define on the proxy?
I've read the official doc but it is not clear for me.

You have to provide a proxy for you model. In the button´s handler you are calling the model's save method (SF.model.Content) then, your SF.model.Content model has to provide a proxy.

Error adding MixedCollection component to extjs form

I am trying to dynamically build a extjs form and when I try to add the dynamically built MixedCollection object to the form I get a TypeError: e.mixins.elementCt is undefined error.
<div id="form-#pageSpecificVar" class="grid-container even"></div>
<script>
Ext.define('HeaderForm', {
extend: 'Ext.form.Panel',
initComponent: function () {
var me = this;
Ext.applyIf(me, {
id: Ext.id(),
defaultType: 'textfield',
items: [{
xtype: 'container',
items: [{
xtype: 'textfield',
fieldLabel: 'Test'
}]
}]
});
me.callParent(arguments);
}
});
// Define our data model
Ext.define('HeaderModel', {
extend: 'Ext.data.Model',
fields: [
{ name: 'FieldA', type: 'int' }
]
});
var store = Ext.create('Ext.data.Store', {
model: 'HeaderModel',
proxy: {
type: 'ajax',
actionMethods: { create: 'POST', read: 'GET', update: 'POST', destroy: 'POST' },
url: '#Url.Content("~/Test/Header")',
timeout: 1200000,
listeners: {
load: function () {
}
}
}
});
store.load({
scope: this,
callback: function (records, operation, success) {
var form = new HeaderForm();
var formItems = new Ext.util.MixedCollection();
Ext.each(records[0].fields.items, function (item) {
console.log(item);
formItems.add(new Ext.form.DisplayField({
fieldLabel: 'Test'
}));
}, this);
console.log(formItems);
form.add(formItems);
form.loadRecord(records[0].data);
form.render('form-#pageSpecificVar');
}
});
</script>
Another thing I don't understand is, when I put the function inside the load listener, nothing happens. So I had to resort to using the callback event.
Update:
form.add method takes a component or component array, so instead of adding MixedCollection type I refer to formItems.items to add the array of displayfields components.
But for some reason the store listeners load is not getting triggered when store.load is executed, does anyone see a problem with that?
Nevermind this... I figured out... I placed the listener instead of the proxy instead of the store.
Q2
Also something weird is that during the callback method of store.load, the records is not return with the loaded values.
Nevermind this... I figured out... It was the json object I'm passing. Forgot to take it out of the error/data structure for form.
Thanks

MixedCollection isn't an accepted parameter for add, you need to use an array. This info is in the docs.